var sKey1 = Symbol('aa')
const duck = {
  name: 'Maurice',
  color: 'white',
  greeting: function() {
    console.log(`Quaaaack! My name is ${this.name}`);
  },
  [sKey1] : function aaFun() {
    return "aaFun"
  },

  ['a '+'b'] : 'hello'
}

console.log( Reflect.has(duck, 'color'));
// true
console.log( Reflect.has(duck, 'haircut'));
// false
// 

// [ "name", "color", "greeting" ]
console.log(Reflect.ownKeys(duck))


console.log(Reflect.set(duck, 'he ll', 'world'))

console.log(duck)
